to selectively afford the corresponding 8-vinyl-1-naphthol derivatives. N-(1-Naphthyl)benzenesulfonamides can similarly react with the alkynes. The reaction of salicylaldehyde with the alkynes using the catalyst system gives 2-hydroxyphenyl vinyl ketones via cleavage of the aldehyde C–H bond.
Synthesis of Chiral 3-Substituted Indanones via an Enantioselective Reductive-Heck Reaction
作者:Ana Minatti、Xiaolai Zheng、Stephen L. Buchwald
DOI:10.1021/jo701741y
日期:2007.11.1
An efficient intramolecular palladium-catalyzed, asymmetric reductive-Heck reaction has been developed, which allowed for the synthesis of either enantiomericallyenriched 3-substituted indanones or α-exo-methylene indanones depending on the base used.
2′-hydroxychalcones from phenyl diethylcarbamate, featuring consecutive Snieckus–Fries rearrangement, anionic Si → C alkyl rearrangement, and Claisen–Schmidt condensation in a single operation. The applicability of this protocol was demonstrated by the highly efficient synthesis of the anti-inflammatory natural product lonchocarpin. The mechanism insight is also provided.
Benzopyran compounds, useful as chemotherapeutic agents
申请人:THE WELLCOME FOUNDATION LIMITED
公开号:EP0025599A1
公开(公告)日:1981-03-25
Known and novel compounds of formula (I)
wherein R4 is hydrogen or lower alkyl, R3 is hydrogen or lower alkyl and R5 is a substituent, or R3 and R5 together form a group -CH2- or -CH2-CH2-, and R1 and R2 each represent four substituents or one or both R1 and R2 represents a methylenedioxy group and two substituents are active against viruses, especially rhinoviruses. Methods for producing the compounds are described, as are pharmaceutical formulations and methods for administering the compounds to cure or prevent rhinoviral infections.